US2026063880A1PendingUtilityA1
Plastic optical folding element, imaging lens module and electronic device
Est. expiryAug 27, 2044(~18.1 yrs left)· nominal 20-yr term from priority
G02B 17/08
62
PatentIndex Score
0
Cited by
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0
Claims
Abstract
A plastic optical folding element includes an incident surface, at least one reflection surface, an exiting surface and a reflection film. A light enters the plastic optical folding element through the incident surface. The reflection surface is for changing a traveling direction of the light. The light leaves the plastic optical folding element from the exiting surface. A reflection film is disposed on the reflection surface, a bottom of the reflection film is physically contacted with the reflection surface, a top of the reflection film is disposed relative to the bottom. The reflection film includes, in order from the bottom to the top which is away from the reflection surface, a first multilayer film, a first connecting layer, a first Ag layer and a blocking layer.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A plastic optical folding element, comprising:
an incident surface, a light entering the plastic optical folding element through the incident surface; at least one reflection surface, the at least one reflection surface for changing a traveling direction of the light; an exiting surface, the light leaving the plastic optical folding element from the exiting surface; and a reflection film disposed on the at least one reflection surface, a bottom of the reflection film physically contacted with the at least one reflection surface, a top of the reflection film disposed relative to the bottom, the reflection film comprising, in order from the bottom to the top which is away from the at least one reflection surface:
a first multilayer film comprising at least one first low reflectance layer and at least one first high reflectance layer, wherein a reflectance of the at least one first high reflectance layer is higher than a reflectance of the at least one first low reflectance layer, and the at least one first high reflectance layer and the at least one first low reflectance layer are stacked alternatively;
a first connecting layer comprising Aluminium oxide;
a first Ag layer comprising Argentum;
a blocking layer comprising at least one of Nickel, Titanium, Vanadium, Chromium, Nickel oxide, Titanium oxide, Vanadium oxide and Chromium oxide; and
a second multilayer film comprising at least one second low reflectance layer and at least one second high reflectance layer, wherein a reflectance of the at least one second high reflectance layer is higher than a reflectance of the at least one second low reflectance layer, and the at least one second high reflectance layer and the at least one second low reflectance layer are stacked alternatively;
wherein a thickness of the first multilayer film is Dmf1, a thickness of the blocking layer is Db, a distance between the first Ag layer and the bottom is Hag1, and the following conditions are satisfied:
70
nm
<
Dmf
1
<
420
nm
;
20
nm
<
Db
<
180
nm
;
and
90
nm
<
Hag
1
<
550
nm
.
2 . The plastic optical folding element of claim 1 , wherein the reflection film further comprises:
a second Ag layer comprising Argentum, and located between the blocking layer and the second multilayer film, wherein the second Ag layer is farther from the at least one reflection surface than the blocking layer from the at least one reflection surface, and is physically contacted with the blocking layer; and a second connecting layer comprising Aluminium oxide, wherein the second connecting layer is farther from the at least one reflection surface than the second Ag layer from the at least one reflection surface, and is physically contacted with the second Ag layer.
3 . The plastic optical folding element of claim 2 , wherein a layer number of the reflection film and a layer material of the reflection film are symmetrically arranged with the blocking layer as a center.
4 . The plastic optical folding element of claim 2 , wherein at least one of the incident surface, the exiting surface and the at least one reflection surface has a curvature.
5 . The plastic optical folding element of claim 2 , wherein a number of the at least one reflection surface is at least two.
6 . The plastic optical folding element of claim 2 , wherein a distance between the second Ag layer and the top is Hag2, and the following condition is satisfied:
60
nm
<
Hag
2
<
480
nm
.
7 . The plastic optical folding element of claim 1 , wherein the distance between the first Ag layer and the bottom is Hag1, and the following condition is satisfied:
180
nm
<
Hag
1
<
460
nm
.
8 . The plastic optical folding element of claim 1 , wherein the thickness of the blocking layer is Db, and the following condition is satisfied:
35
nm
<
D
b
<
120
nm
.
9 . The plastic optical folding element of claim 1 , wherein an average reflectance measured from the bottom of the reflection film reflective to a wavelength from 400 nm to 1000 nm is R1, and the following condition is satisfied:
85
%
<
R
1
<
1
0
0
%
.
10 . The plastic optical folding element of claim 1 , wherein an average reflectance measured from the top of the reflection film reflective to a wavelength from 400 nm to 1000 nm is R2, and the following condition is satisfied:
95
%
<
R
2
<
100
%
.
11 . The plastic optical folding element of claim 1 , wherein a main material of the blocking layer is Nickel.
12 . The plastic optical folding element of claim 1 , further comprising:
a plurality of connecting surfaces connected to the incident surface, the exiting surface and the at least one reflection surface, wherein there is a step structure between the at least one reflection surface and one of the connecting surfaces adjacent thereto for forming a height difference between the at least one reflection surface and the connecting surface, the height difference is Hs, and the following condition is satisfied:
0.005
mm
≤
Hs
≤
0.22
mm
.
13 . A plastic optical folding element, comprising:
an incident surface, a light entering the plastic optical folding element through the incident surface; at least one reflection surface, the at least one reflection surface for changing a traveling direction of the light; an exiting surface, the light leaving the plastic optical folding element from the exiting surface; and a reflection film disposed on the at least one reflection surface, a bottom of the reflection film physically contacted with the at least one reflection surface, a top of the reflection film disposed relative to the bottom, the reflection film comprising, in order from the bottom to the top which is away from the at least one reflection surface:
a first multilayer film comprising at least one first low reflectance layer and at least one first high reflectance layer, wherein a reflectance of the at least one first high reflectance layer is higher than a reflectance of the at least one first low reflectance layer, and the at least one first high reflectance layer and the at least one first low reflectance layer are stacked alternatively;
a first connecting layer comprising Aluminium oxide;
a first Ag layer comprising Argentum; and
a blocking layer comprising at least one of Nickel, Titanium, Vanadium, Chromium, Nickel oxide, Titanium oxide, Vanadium oxide and Chromium oxide;
wherein a thickness of the first multilayer film is Dmf1, a thickness of the blocking layer is Db, a distance between the first Ag layer and the bottom is Hag1, and the following conditions are satisfied:
0.1
<
Db
/
Dmf
1
<
0.9
;
70
nm
<
Dmf
1
<
420
nm
;
and
90
nm
<
Hag
1
<
550
nm
.
14 . The plastic optical folding element of claim 13 , wherein the reflection film further comprises:
a second Ag layer comprising Argentum, wherein the second Ag layer is farther from the at least one reflection surface than the blocking layer from the at least one reflection surface, and is physically contacted with the blocking layer.
15 . The plastic optical folding element of claim 14 , wherein at least one of the incident surface, the exiting surface and the at least one reflection surface has a curvature.
16 . The plastic optical folding element of claim 14 , wherein a number of the at least one reflection surface is at least two.
17 . The plastic optical folding element of claim 13 , wherein the distance between the first Ag layer and the bottom is Hag1, and the following condition is satisfied:
180
nm
<
Hag
1
<
460
nm
.
18 . The plastic optical folding element of claim 13 , wherein the thickness of the blocking layer is Db, and the following condition is satisfied:
35
nm
<
Db
<
120
nm
.
19 . The plastic optical folding element of claim 18 , wherein the thickness of the first multilayer film is Dmf1, the thickness of the blocking layer is Db, and the following condition is satisfied:
0.1
<
Db
/
Dmf
1
<
0.4
.
20 . The plastic optical folding element of claim 13 , wherein an average reflectance measured from the bottom of the reflection film reflective to a wavelength from 400 nm to 1000 nm is R1, and the following condition is satisfied:
85
%
<
R
1
<
1
0
0
%
.
21 . The plastic optical folding element of claim 14 , wherein an average reflectance measured from the top of the reflection film reflective to a wavelength from 400 nm to 1000 nm is R2, and the following condition is satisfied:
95
%
<
R
2
<
100
%
.
22 . The plastic optical folding element of claim 13 , wherein a main material of the blocking layer is Nickel.
23 . The plastic optical folding element of claim 13 , further comprising:
a plurality of connecting surfaces connected to the incident surface, the exiting surface and the at least one reflection surface, wherein there is a step structure between the at least one reflection surface and one of the connecting surfaces adjacent thereto for forming a height difference between the at least one reflection surface and the connecting surface, the height difference is Hs, and the following condition is satisfied:
0.005
mm
≤
Hs
≤
0.22
mm
.
24 . An imaging lens module, comprising:
the plastic optical folding element of claim 1 .
25 . An imaging lens module, comprising:
the plastic optical folding element of claim 13 .
26 . An electronic device, comprising:
the imaging lens module of claim 24 .
27 . An electronic device, comprising:
the imaging lens module of claim 25 .Join the waitlist — get patent alerts
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